Product manual

Appendix D: Setting Model 6 and Model 26 Audio Levels

118 025-9158L

5. If the voltage measured at the FFSK test point (TP6) while receiving the FFSK

test tone is less than 1Vp-p (0.35 Vrms), turn the FSK POST RCV pot (R78) on

the Model 26 clockwise until it is at least 1.0 Vp-p.

6. If the voltage measured at the FFSK test point (TP6) while receiving the FFSK

test signal is greater than 1.0 Vp-p (0.35 Vrms), turn the 4W RCV pot (R69) on

the Model 26 counterclockwise until it is 1.0 Vp-p or less.

Note

Communications between the Model 26 and the Model 6 should

now begin. Test the alert or PA on functions by pressing the

buttons on the Model 26 and noting the responses at the Model

Setting FFSK Levels in a Wire Line-based System

The following procedures are very similar to the ones used in radio-based system;

however, in some cases the specific pots used have changed. It also matters whether the

wire-line system is 2-wire or 4-wire. Pay close attention to ensure that you adjust the

correct controls.

Model 26 FFSK Transmit Level

Set the Model 26 Transmit level by performing the following steps. The jumper positions

on the Model 26 should be verified prior to setting up the system. See

Table 6 and Figure

27.

♦

Setting the Model 26 FFSK transmit level:

1. Attach an oscilloscope or RMS voltmeter to the appropriate contacts on the back

of the Model 26 in order to take readings on the FFSK transmit level during this

procedure.

• 2-wire = connector J4 pins 9 and 11

• 4-wire = connector J5 pins 3 and 4

2. At the Model 26, connect the laptop (or PC) to the serial programming port of the

Model 26. Set Switch 7 on the rear of the Model 26 to the ON position (places

the unit in the programming mode). Hit the SPACE bar three times to open the

Model 26 Main menu.

3. Enter a “7” to open the FFSK Test Menu.

4. Enter a “1” to initiate the FFSK test mode. The Model 26 should transmit the

FFSK test signal for 30 seconds and then stop. If you finish making adjustments

before 30 seconds is up, you can cancel the test by hitting any character key on