User Manual

SGD-SB2025NT-TUM, Part 1
Jan 12 Page 23 GENERAL DESCRIPTION
Table 8. NI Status Indicator.
Colour State Condition Precedence
Green Steady Normal Operation – Idle 5
Central NI = Voted Signal is present
Yellow Flashing (approx 0.5 Hz)
Station NI = Rx Signal/squelch active
4
Central NI = Tx Key I/P is present
Yellow Steady
Station NI = Tx Keyed
3
Red Flashing (approx 0.5 Hz)
Loss of 1PPS signal or an inhibit condition
is applied
2
Red Steady No Network Communications 1
The precedence column shows what indication will be displayed when two or more states coincide;
the highest level is 1, the lowest level is 5.
4.1.1.4 USB Connector
The Universal Serial Bus (USB) Type B connector is used for basic connection of the ET.
4.1.2 Rear Panel
The rear panel of the SB2025 series base station is identical for all models and is illustrated below
in Figure 3. The functions of each connector on the rear panel are detailed overleaf in Table 9.
Figure 3. SB2025NT Rear Panel.
DC Power
Input
CN8 N-Type
Tx Output
CN9
RJ45
CN7 BNC 10 MHz
High Stab. Osc. Input
CN1
GPS 1PPS
Timing Signal
CN3 I/O
Environment
Thermally
Controlled Fan
CN6 N-Type
Rx Input