Motorola HT 1000 service manual

RF Test Mode, MT 2000,

MTS 2000, and MTX

Series Radios

Control Head Test Mode,

MT 2000, MTS 2000,

and MTX Series Radios

clockwise. The loudness of tone beeps will increase and decrease accordingly.

NOTE: During test mode, the volume level is not regulated to the same limits as during normal radio operation.

To exit test mode, turn the radio off then back on.

When the MT 2000, MTS 2000, or MTX series radio is operating in its normal environment, the radio’s microcomputer controls the RF channel selection, transmitter key-up, and receiver muting. However, when the unit is on the bench for testing, alignment, or repair, it is removed from its normal environment. It cannot receive commands from its system and, therefore, the internal microcomputer will not key the transmitter nor unmute the receiver. This prevents the use of normal tune-up procedures. To solve this problem a special routine, called TEST MODE or “air test,” has been incorporated in the radio.

To enter test mode:

1.Turn the radio on.

2.After the self test is complete, press the monitor button (side button 3, SB3) five times in succession, within 10 seconds.

3.After “RF TEST” appears (on 14-character displays) or “RF TST” appears (on 6-character displays), press the orange button on top of the radio once. “1 CSQ” appears, indicating: test frequency 1, carrier squelch mode.

4.Each additional press of SB3 will advance to the next test channel. (Refer to Table 8.)

5.Pressing SB2 will scroll through and access test environments as shown in Table 7.

NOTE: Transmit into a load when keying a radio under test.

NOTE: Radios without display indicate test- environment function by emitting a corresponding number of beeps. See Table 7.

To check the display, the buttons, and the switches, perform the following tests:

1.Turn radio on.

2.After the self test is complete, press the monitor button (side button 3, SB3) five times in succession, within 10 seconds.

3.After ”RF TEST” appears on the display, press side button 1 (SB1), “CH TEST” (14-character radio) or “CH TST” (6-character radio) appears on the display.

4.Next, press and hold the orange button on top of the radio; all segments on the display will light, and the LED on the control top will illuminate a yellowish color.

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