NCP700671CNon-Broadcast Transmitter

FRONT VIEW SIDE VIEW 1 SIDE VIEW 2 BOTTOM VIEW TOP VIEW REAR VIEW COMPONENT WITH SHIELDS COMPONENT WITHOUT SHIELDS EXCITER,TRACK SIDE PA, TRACK SIDE CONTROL I/F CONTROL HEAD CONTROL, REAR CONTROL, TRACK CONTROL, COMPONENT CONTROL, COMPONENT 2 CONTROL CASE

15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). 70-0671 Alignment Procedure SETUP 1 Remove the six securing screws from the bottom cover , and the cover itself. 2 Connect a resistive 50 Ω RF load and wattmeter to Antenna Connector J502. 3 Connect 13.4V DC power to transceiver J505. 4 Connect a 3.2 Ω, 20W resistor to pins 4 and 6 of the Accessory Plug. The jumper between pins 5 and 6 must be temporarily removed to make this connection. The resistor serves as a constant load to replace the speaker’s inconsistencies. CAUTION:Both speaker terminals are LIVE. Never ground either one. Connect grounded receive- audio measuring-equipment to only one side of the speaker, and chassis ground. Normally, voltage measurement will be half of true values. 5 Turn the radio on (Push on and Push off switch), set the VOLUME control to a mid-position. 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). Connect the Programmer to Programming Port Mic Jack J302. Upload the radio programming Data-Packet into the Programmer and initiate its Remote Control Mode. Refer to the appropriate manual for details. SYNTHESIZER ALIGNMENT •VCO Resonance 1 Select the Remote Control Mode of the Programmer and enter the following test frequencies: A-BandB-BandC-Band RX Frequency30.0036.0042.00 MHz TX Frequency30.0036.0042.00 MHz 2 Adjust Channel RX Tank L713 for 1.5V DC at VC (VCO Steering) . 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). 3 Active transmit mode (using the programmer ) and adjust TX Tank L702 for 1.5V DC at VC (VCO Steering) . 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). •Reference Oscillator 4 Initiate transmit on any channel. Measure transmitted RF carrier frequency without modulation and, if necessary, adjust REFERENCE OSCILLATOR X701 for carrier frequency to within ±30Hz of channel frequency. PA MODULE ALIGNMENT The 70-0671 should be adjusted to have a 6 MHz channel spread (8 MHz C-Band) at 110W. To do so : 1 Change the TX test frequency to the desired frequency. 2 Activate transmit mode and measure RF power at Antenna connector J502. Set RF output power to 110W at J502 using the programmer. MODULATOR ALIGNMENT 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). •Modulation Limiting 1 Disconnect the hand microphone from its front panel Mic Jack J302. Apply 3Vrms of 1000Hz signal to pin 1 of Mic Jack J302, then initiate transmit. 2 Measure total carrier deviation and, if needed adjust modulation limiting to obtain ±5KHz (wide) or ±2.5KHz (narrow) using the programmer. •Microphone Gain 3 No alignment for Microphone gain is required. •CTCSS/DCS 4 Remove the 1KHz audio signal from Mic Jack J302. 5 Add 250.3Hz CTCSS tone to the transmit test by testing frequency using the programmer. 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). 6 Adjust CTCSS deviation to ±750 Hz ± 10 Hz (wide) or ± 375 Hz ± 10 Hz (narrow) deviation using the programmer. 7 Change 67.0 Hz CTCSS tone to the transmit test by testing frequency using in the programmer. 8 Adjust RV401 for ±750 Hz ± 100 Hz (wide) or ± 375 Hz ± 100 Hz (narrow) deviation. 9 Change the transmit DCS code +023 to the transmit test by testing frequency using the programmer. 10 Adjust RV401 so that modulation waveform from modulation analyzer matches the correct waveform shown in Figure 2-1. 11 Change 250.3 Hz CTCSS tone to the transmit test by testing frequency using the 15 Squelch level set maximum ( 80 ). by using the front UP / DN switch 16 Apply 0.95 uV of modulated standard deviation on-channel RF signal to the 50 Ω antenna connector. Adjust Squelch range RV201 counter-clockwise just until squelch opens ( audio on ). programmer. Carefully adjust RV401 for ± 750 Hz ± 10 Hz (wide) or ± 375 Hz ± 10 Hz (narrow) deviation. • DTMF 12 Clear the CTCSS tone, then initiate transmit test by testing frequency using the programmer. 13 Adjust DTMF deviation to ± 2.0KHz ± 10 Hz (wide) or ± 1KHz ± 10 Hz (narrow) deviation using the programmer.

ENGINEERING STATEMENT For Type Certification of MIDLAND USA Model No: 70-0671C FCC ID: NCP700671C I am an Electronics Engineer, a principal in the firm of Hyak Laboratories, Inc., Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. Hyak Laboratories, Inc. has been authorized by Midland USA to make type certification measurements on the 70-0671C transceiver. These tests made by me or under my supervision in our Springfield laboratory. Test data and documentation required by the FCC for Type Certification are included in this report. The data verifies that the above mentioned transceiver meets FCC requirements and Type Certification is requested. ______________________________ Rowland S. Johnson Dated: October 20, 1999 A. INTRODUCTION The following data are submitted in connection with this request for Type Certification of the 70-0671C transceiver in accordance with Part 2, Subpart J of the FCC Rules. 2 The 70-0671C is VHF, frequency modulated transceiver intended for 25 kHz channel land mobile applications in the 42 - 50 MHz band. It operates from a 13.8 vehicle supply. Output power rating is 110 watts. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Paragraph 2.983 of the Rules) 1. Name of applicant: Midland USA 2. Identification of equipment: NCP700671C a. The equipment identification label is submitted as a separate exhibit. b. Photographs of the equipment are submitted as a separate exhibit. 3. Quantity production is planned. 4. Technical description: a. 16k0F3E emission b. Frequency range: 42 - 50 MHz. c. Operating power of transmitter is fixed at the factory at 110 watts. d. Maximum power permitted under Part 90 of the FCC is 350 watts, and the 70-0671C fully complied with those power limitations. e. The dc voltage and dc currents at final amplifier: Collector voltage: 13.5 Vdc Collector current: 17.3 A f. Function of each active semiconductor device: See Appendix 1. g. Complete circuit diagram is submitted as a separate exhibit. h. A draft instruction book is submitted as a separate exhibit. i. The transmitter tune-up procedure is submitted as a separate exhibit. B. GENERAL INFORMATION (continued) j. A description of circuits for stabilizing frequency is included in Appendix 2. k. A description of circuits and devices employed for suppression of spurious radiation and for limiting modulation is included in Appendix 3. l. Not applicable. 5. Data for 2.985 through 2.997 follow this section. 3 C. RF POWER OUTPUT (Paragraph 2.985(a) of the Rules) RF power output was measured with a Bird 4421 RF power meter and a Bird 8325-power attenuator as a 50 ohm dummy load. Maximum power measured was 110 watts. D. MODULATION CHARACTERISTICS 1. A curve showing frequency response of the transmitter is shown in Figure 1. Reference level was audio signal output from a Boonton 8220 modulation meter with one kHz deviation. Audio output was measured with a Audio Precision System One TRMS voltmeter and tracking generator. 2. Modulation limiting curves are shown in Figures 2a and 2b for wide or narrow channel operation respectively, using a Boonton 8220 modulation meter. Signal level was established with a Audio Precision System One TRMS voltmeter. The curves show compliance with paragraphs 2.987(b), and 90.211(c). 3. Figure 3 is a graph of the post-limiter low pass filter which meets the requirements of paragraph 90.211(d)(1) in providing a roll-off of 60Logf/3 dB where f is audio frequency in kHz. Measurements were made following EIA RS-152B with an Audio Precision System One selective voltmeter on the Boonton 8220 modulation meter audio output. 4. Occupied Bandwidth (Paragraphs 2.989(c), 90.209(b)(4) and 90.210(d) of the Rules) Figures 4 is a plot of the sideband envelope of the transmitter taken with a Advantest R3361A spectrum analyzer. Modulation corresponded to conditions D. MODULATION CHARACTERISTICS (continued) of 2.989(c)(1) and consisted of 2500 Hz tone at an input level 16 dB greater than that necessary to produce 50% modulation at 2769 Hz, the frequency of maximum response. Measured modulation under these conditions was 3.5. The plot has unmodulated carrier as 0 dBm reference. 4 FIGURE 1 MODULATION FREQUENCY RESPONSE 5 MODULATION FREQUENCY RESPONSE FCC ID: NCP700671C FIGURE 1 FIGURE 2 AUDIO LIMITER CHARACTERISTICS 6 AUDIO LIMITER CHARACTERISTICS FCC ID: NCP700671C FIGURE 2 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE 7 AUDIO LOW PASS FILTER RESPONSE FCC ID: NCP700671C FIGURE 3 FIGURE 4 OCCUPIED BANDWIDTH 8 ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency more than 50% up to and including 100% of the 25 authorized bandwidth, 20 kHz (10-20 kHz) On any frequency more than 100%, up to and including 250% of the 35 authorized bandwidth (20-50 kHz) On any frequency removed from the assigned frequency by more 43+10LogP = 63 than 250% of the authorized (P = 110 W) bandwidth (over 50 kHz) OCCUPIED BANDWIDTH FCC ID: NCP700671C FIGURE 4 D. MODULATION CHARACTERISTICS (Continued) The plot is within the limits imposed by Paragraph 90.211(c) for frequency modulation. The horizontal scale (frequency) is 10 kHz per division and the vertical scale (amplitude) is a logarithmic presentation equal to 10 dB per division. 9 E. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS (Paragraph 2.991 of the Rules) The 70-0671C transmitter was tested for spurious emissions at the antenna terminals while the equipment was modulated with a 2500 Hz signal, 16 dB above minimum input signal for 50% modulation at 2769 Hz, the frequency of highest sensitivity. Measurements were made with Tektronix 494P spectrum analyzer coupled to the transmitter output terminal through a Bird 8325 power attenuator. A notch filter was used to attenuate the carrier. During the tests, the transmitter was terminated in the 50 ohm attenuator. Power was monitored on a Bird 43 Thru-Line wattmeter; dc supply was 13.8 volts throughout the tests. Spurious emissions were measur…

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