Local Unit; If Gain; 2Nd Local Oscillator; 2Nd Local Oscillator Amplifier - Yaesu Mark-V FT-1000MP Field Technical Supplement

IF Gain

r Inject a +11 dBµ signal to the antenna jack, and tune the main
dial for peak indication on the S-meter.
r Now adjust VR8006 for 1-dot S-meter deflection.
S-Meter Full Scale
r Inject a +100 dBµ signal to the antenna jack, and tune the main
dial for peak indication on the S-meter.
r Adjust VR8007 for S9 +60 dB on the S-meter.
FM Squelch Threshold
r In FM mode, with no signal at the antenna jack, set the SQL
control to the 11-o'clock position.
r Now adjust VR8001 so that the squelch just closes.
SSB Squelch Threshold
r In the SSB mode, with no signal at the antenna jack.
r Confirm that the SQL control is in the 9- to 12-o'clock posi-
tion when the squelch is just closed.

Noise Blanker

r Connect the DC voltmeter to TP8001, press the NB button,
then inject a +40 dBµ signal to the antenna jack.
r Adjust T8001 for minimum indication in the DC voltmeter.
Reduce the injection level to +23 dBµ and confirm that the
voltage is now less than 3.4 V.
2nd Local Amplifier
T4009
3rd Local Amplifier
T4010
WIDTH DDS Amplifier
TP4004
WIDTH DDS Amplifier
Connect RF Millivoltmeter
(>70 mVrms)
T4006
2nd Local Amplifier
2nd Oscillator: Connect RF Millivoltmeter (>400 mVrms)
J4003
3rd Local Amplifier: Connect 50 W Dummy
in parallel with RF Millivoltmeter (>100 mVrms)
T4008 T4007
2nd Local Amplifier
TP4002
Frequency Counter (62.24 MHz ± 200 Hz)
PLL BPF (67.98 MHz)
PLL BPF (67.98 MHz)
PLL BPF (67.98 MHz)
Local Unit Test & Alignment Points

Local Unit

Refer to the drawing at the page bottom for LOCAL Unit com-
ponent locations and alignment points.

2nd Local Oscillator

r Connect the RF millivoltmeter to TP4002, and adjust T4001
for maximum indication on the RF millivoltmeter (at least 400
mV ), then turn T4001 1/4-clockwise futher more.
rms
r Replace the RF millivoltmeter with a frequency counter at
TP4002, and confirm the frequency counter reading is 62.240
MHz (±600 Hz).

2nd Local Oscillator Amplifier

r Remove the coaxial plug from J4002, and connect a 50 W
resistor in parallel with the RF millivoltmeter across the socket.
r Adjust T4006 and T4007 in succession several times for peak
RF millivoltmeter indication (at least 170 mV
r Remove the meter and resistor, and replace the plug into J4002.
WIDTH DDS Amplifier
r Connect the RF millivoltmeter to TP4004, and adjust T4010
for maximum indication on the RF millivoltmeter (at least 70
mV ).
rms
TP4005
PLL Main Loop VCO: Connect DC Voltmeter (1.65 V ± 0.01 V)
VR4001
PLL Main Loop VCO
T4005
T4004 J4002
2nd Local Amplifier: Connect 50 W Dummy
T4003
Alignment
TP4003
PLL Main Loop VCO: Connect DC Voltmeter (8.5 V ± 0.1 V)
TC4001
PLL Main Loop VCO
TC4002
PLL Main Loop VCO
TC4003
PLL Main Loop VCO
TC4001
PLL Main Loop VCO
TP4001
PLL BPF (67.98 MHz): Connect RF Millivoltmeter (>100 mVrms)
T4002
PLL BPF (67.98 MHz)
in parallel with RF Millivoltmeter (>170 mVrms)
).
rms
3-3