Hytera tm-800, Adjustment Description

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TM-800 UHF SERVICE MANUAL
144
Model RX/TX 1 ( FC ) 2 (F L ) 3 (FH ) 4 5 6 7 8
RX(MHz) 155.15 136.15 173.85 145.55 164.55 155.00 155.20 155.40
0
（
V
）
TX(MHz) 155.00 136.00 174.00 145.50 164.50 155.00 155.20 155.40
RX(MHz)
481.15 450.15 511.85 465.55
496.55
481.00 481.20 481.40
1
（
U1
）
TX(MHz)
481.00 450.00 512.00 465.50 496.50 481.00 481.20 481.40
RX(MHz)
375.15 350.15 399.85 362.55 387.55 375.00 375.20 375.40
2
（
U2
）
TX(MHz)
375.00 350.00 400.00 362.50 387.50 375.00 375.20 375.40
RX(MHz)
435.15 400.15 469.85 417.55 452.55 435.00 435.20 435.40
3
（
U3
）
TX(MHz)
435.00 400.00 470.00 417.50 452.50 435.00 435.20 435.40
RX(MHz) 465.15 440.15 489.85 452.55 477.55 465.00 465.20 465.40 4
（
U4
）
TX(MHz)
465.00 440.00 490.00 452.50 477.50 465.00 465.20 465.40
RX(MHz)
503.15 480.15 525.85 491.75 515.25 503.00 503.20 503.40
5
（ U5 ）
TX(MHz)
503.00 480.00 526.00 491.70 515.20 503.00 503.20 503.40
RX(MHz)
425.15 400.15 449.85 412.55 437.55 425.00 425.20 425.40
6
（ U6 ）
TX(MHz)
425.00 400.00 450.00 412.50 437.50 425.00 425.20 425.40
VCO
Measurement Adjustment
Item Condition
Test Instrument Terminal Part Method
Specification /
Remarks
1. Power supply
1.Power supply
voltage DC13.6V
Note:
1. This radio may be installed in negative
ground electrical systems only. Reverse polarity
will cause the cable fuse to blow. Check the
vehicle ground polarity before installation to
prevent wasted time and effort.
2. If DC power is to be controlled by the vehicle ignition switch, a switching relay
should be used to switch the positive power lead. The vehicle ignition switch
then controls DC to the relay coil.
1.CH: TX HI 7.1V±0.1V
2. VCO lock voltage
(TX)
2.CH: TX LO
TC1
Check
＞ 1.8V
1.CH: RX HI 7.1V±0.1V
3. VCO lock voltage
(RX)
2.CH: RX LO
Digital Voltmeter CV
TC2
Check ＞ 1.8V