User Manual

What Frequency Will the SRPT-30/40A Power-Up on?

SRPT-30 Only:

The SRPT-30 will power-up on frequency F1 or F2 depending on the position of the F1/F2 front panel switch. The

frequencies corresponding to F1 and F2 were determined at the time of order and are hard coded within the synthesizer.

SRPT-40A Only:

The SRPT-40A will always power up on the last frequency it was locked onto before last power-down. If you’re not

sure what frequency the SRPT-40A will power up on, first make sure that the POWER ADJUST pot is at a minimum

(turned fully counter-clockwise) before powering up the SRPT-40A. After the SYNTHESIZER is locked and the

TRANSMIT/STANDBY switch is set in the TRANSMIT position, monitor the RF output with a frequency counter. If

necessary, increase the POWER ADJUST pot (turn clockwise) slowly until the frequency counter registers a frequency

reading.

WARNING

NEVER CONNECT THE FREQUENCY COUNTER DIRECTLY TO THE RF OUTPUT CONNECTOR

OF THE SRPT-30 OR SRPT-40A.

THE FREQUENCY COUNTER SHOULD BE COUPLED OFF OF AN RF COUPLER OR A WATT

METER.

EXCEEDING THE INPUT POWER RATING OF THE FREQUENCY COUNTER COULD DO

INTERNAL DAMAGE TO IT.

Inputting Audio

Plug in microphones (Inputs 1 - 3) or tape player (Input 4 internally switched to “HI” position; See MIC Input

Connections, above) and check operation by setting the METER CONTROL knob to the AUDIO COMPRESSION

position and observing the compression on METER and by a headset plugged into MONITOR jack. Set AUDIO GAIN

controls paragraph in the CONTROL & CONNECTOR FUNCTIONS section for how to adjust for no more than -3 VU

audio compression on the METER.

Changing Output Frequency Direct

SRPT-30 Only:

Simply change the position of the F1/F2 front panel switch and the unit will change to the corresponding frequency.

SRPT-40A Only:

To change the frequency of the SRPT-40A, the S1 dip-switches on the Front Panel Control & Meter board (800-

385A) behind the front panel (see the SRPT-40A Adjustment Locations) need to be set with switches 1 and 2 in the

“ON” position and switches 3 and 4 in the “OFF” position. These positions are the normal position and are set at the

factory, so there should be no need to remove the top cover.