User's Manual

Location Pin Assignment Type Signal Characteristics
21 GPIO 8/Analog
Output 2
5
Digital or
Analog
Digital:
Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10 k pull-up to 5 V
Input Logic Low: 0–0.8 VDC
Input Logic High: 3.0–14 VDC
Analog: 0–5 VDC
22 Tx Audio 1 Audio Transmit Audio – Nominal input level is 80 mVrms for 60%
deviation with scaling factor set to 100%. 600 Ω input
23 GPIO 4 Digital Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10 k pull-up to 5 V
Input Logic Low: 0–0.8 VDC
Input Logic High: 3.0–14 VDC
24 GPIO 5 Digital Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10 k pull-up to 5 V
Input Logic Low: 0–0.8 VDC
Input Logic High: 3.0–14 VDC
25 Tx Audio 2
5
Audio Transmit Audio – Nominal input level is 80 mVrms for 60%
deviation with scaling factor set to 100%. 600 Ω input
7.2.9
Frequency Reference
The Frequency Reference port is a BNC (female) type connector.
Figure 33: Frequency Reference Connector
Various external frequency reference signal types can be provided to the SLR 5000 series repeater for
normal operation. Table 33: Frequency Reference on page 78 provides a list of acceptable input
signal types as well as their permissible levels.
Table 33: Frequency Reference
Frequency (MHz) Waveform
6
Level (Vpp) Impedance (Ω)
7
Note
5 Sine 1.5–5.3 100 k AC Coupled
5 Square
6
1.5–5.3 100 k AC Coupled
10 Sine 1.5–5.3 100 k AC Coupled
10 Square
6
1.5–5.3 100 k AC Coupled
6
Square wave duty cycle range is 45–50%.
7
Impedance of the SLR 5000 series repeater's frequency reference port.
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Chapter 7: SLR 5000 Series Back Panel
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