Vertex Standard VX-177 manual Checking the Repeater Uplink Input Frequency, VFO Split Mode

REPEATER OPERATION

MANUAL REPEATER SHIFT ACTIVATION

Checking the Repeater Uplink (Input) Frequency

It often is helpful to be able to check the uplink (input) frequency of a repeater, to see if the calling station is within direct (“Simplex”) range.

To do this, just press the [REV(HOME)] key. You’ll notice that the display has shifted to the repeater uplink frequency. Press the [REV(HOME)] key again to cause operation to revert to normal monitoring of the repeater downlink (out- put) frequency. While you are listening on the input fre- quency to the repeater using the [REV(HOME)] key, the repeater offset icon will blink.

The configuration of this key may be set either to “RV” (for checking the input fre- quency of a repeater), or “HM” (for instant switching to the “Home” channel for the band you are operating on). To change the configuration of this key, use Set Mode Item 33: REV/HM. See page 79.

VFO SPLIT MODE

For working on repeaters with odd splits, or communicating with astronauts on orbiting space vehicles, it may be necessary to use non-standard splits between the receive and transmit frequency. If the application is infrequent enough not to warrant the dedication of a memory channel for this purpose, the “VFO Split” mode may be used. Here is the proce- dure for going Split:

1.Press the [VFO(PRI)] key, as needed, to select VFO-A. Set VFO-A for the desired receiving (downlink) frequency (e.g.439.700 MHz).

2.Now press the [VFO(PRI)] key, and set VFO-B for the desired transmit (uplink) fre- quency (e.g. 434.900 MHz).

3.Press the [VFO(PRI)] key once more to re-establish VFO-A as the “Main” (receive) VFO.

4.Press the [F] key, then press the [0(SET)] key to enter the Set mode.

5. Rotate the DIAL to select Set Mode Item 50: VFO.SPL.

6. Press the [F] key, then rotate the DIAL to set this function “VSP. ON.”

7. Press the PTT switch once to save the new setting and exit to

normal operation. 8. You will now be operating in the Split mode. When you press

the PTT switch to transmit, you will observe that VFO-A and

VFO-B will reverse positions. The VFO selection indicator “-b-” will blink while the transceiver is transmitting, this means that the VFO Split feature is now activated.

VX-177 OPERATING MANUAL 21