Product manual

Installation
22 025-9158L
JP9 (4 WIRE RCV IMPEDANCE)
This jumper selects the impedance of the 4-wire receive audio input. There are three
positions for this jumper:
Position A = Selects 600Ω
Position B = Selects 10 kΩ
No jumper = Selects 10 kΩ
JP9 should be in the A position (600Ω) if there is only a single Model 26 in the system. If
there are additional Model 26s and they are connected in parallel to the primary Model
26, then the primary Model 26 should have JP9 in the A position and all other Model 26s
should have JP9 in the B position (10 kΩ).
JP10 (FFSK OUTPUT RANGE)
JP10 selects between three different output signal ranges for FFSK transmissions. There
are four conditions for this jumper:
Position A = TEL is the middle output level. This level is for wire line
interfacing.
Position B = PWR is the highest output level. This level is not typically
required provided the “end-to-end” loss is within specification.
Position C = RAD is the lowest output level. This level is for radio interfacing.
No jumper = This condition produces the same result as the “TEL” position.
If the Model 26 is operating over a wire line communication link with the Model 6s, JP10
should be in the TEL position to allow for a 1 Vp-p output signal. If the Model 26 is
interfaced with a radio, JP10 can be placed in the RAD position to provide lower output
levels.
JP11 (2 WIRE RCV IMPEDANCE)
JP11 selects the impedance of the 2-wire receive audio. There are three positions for this
jumper:
Position A = Selects 600Ω
Position B = Selects 3.3 kΩ
No jumper = Selects 3.3 kΩ
JP11 should be in the A position (600Ω) if there is only a single Model 26 in the system.
If there are additional Model 26s in a multiple position system, and they are connected in
parallel to the primary Model 26 then the primary Model 26 should have JP11 in the A
position and all other Model 26s should have JP11 in the B position (3.3 kΩ).