Yaesu FT-7100M, Technical Supplement

Page: 11 / 68

11
Alignment
PLL Reference Frequency
r Connect the wattmeter, dummy load, and fre-
quency counter to the antenna jack.
r Tune the transceiver to 439.900 MHz, and set the
TX power level to “
M ID 2
.”
r Key the transceiver, and adjust TC1001 on the
MAIN UNIT, if necessary, so the counter fre-
quency is within 100 Hz of 439.900 MHz.
VHF Transmitter Deviation
r Connect the wattmeter, dummy load, and devia-
tion meter to the antenna jack.
r Inject a 1 kHz audio signal at a level of 50 mV to
pin 5 of the
MIC jack (pin 4 is Ground).
r Key the transmitter on 146.000 MHz. Adjust
VR1002 for 4.0 ±0.5 kHz (for USA version; other
versions: 4.5 ± 0.5 kHz) deviation on the devia-
tion meter.
UHF Transmitter Deviation
r
Leave the wattmeter, dummy load, and deviation
meter connected to the antenna jack.
r Inject a 1 kHz audio signal as a level of 50 mV to
pin 5 of the
MIC jack (pin 4 is Ground).
r Key the transmitter on 440.000 MHz. Adjust
VR1001 for 4.0 ±0.5 kHz (for USA version; other
versions: 4.5 ± 0.5 kHz) deviation on the devia-
tion meter.
VR1001 TC1001 VR1002