HYT TC-610P Service Manual page 76

3） Adjustment Items Include:
Tx group items:
Tx frequency tolerance, VCO lock voltage, max deviation, modulation sensitivity (adjusted through
hardware out of Adjustment Mode), Tx low power, Tx high power, CDCSS waveform, CDCSS
deviation, CTCSS deviation (low), CTCSS deviation (medium), CTCSS deviation (high), Tx low
voltage threshold (adjusted through software in Adjustment Mode).
Rx Group Items:
VCO lock voltage (adjusted outside Adjustment Mode), Squelch, Rx bandpass filter, Rx low voltage
threshold.
3. Specific Operations and Requirements
(1) Conventional Adjustment Items (outside the Adjustment Mode): Tx frequency tolerance, VCO
lock voltage, max deviation, modulation sensitivity.
Note: Channels 1, 2 and 3 are preset to low, medium and high frequency respectively in wide band,
and channels 4, 5 and 6 are preset to low, medium and high frequency respectively in narrow band.
Be sure to connect antenna or load before adjustment.
TC-610P VHF
(1) Outside the Adjustment Mode
Item Condition
Rotate the Channel
Tx Frequency Selector knob to CH2
Tolerance and press PTT to
transmit.
Rotate the Channel
Selector Knob to
CH3 and press PTT
Tx VCO Lock to transmit.
Voltage
Rotate the Channel
Selector knob to CH1
and press PTT to
transmit.
Test
Test Test
Instrument point
Communication
Antenna VR300
Test Set
Digital
CV
Voltmeter
74
TC-610P Service Manual
Adjustment
Part Method
Adjust VR300 with
ceramic tuning tool to
control the center
frequency within the
error range.
Adjust TC100 with
ceramic tuning tool
until the lock voltage
meets the
TC100 requirements.
Check
Specifications
/ Remarks
≤150Hz
≥2.9V
≥0.8