Position Accuracy (Rms); Satellite Tracking; Acquisition; I/O Configuration - Arbiter Systems 1084A Operation Manuals

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A.2.5

Position Accuracy (rms)

25 meters, SA (USA Department of Defense Selective Availability) OFF, 100 meters, SA ON.
Elevation, 140 meters, SA on
A.2.6

Satellite Tracking

12 channels, C/A code (1575.42 MHz)
The receiver simultaneously tracks up to twelve satellites. Results from all tracked satellites are
averaged in Position-Hold Mode or, with Position-Hold Off, are determined by least-squares esti-
mation.
A.2.7

Acquisition

150 seconds typical, cold start
15 minutes, 90% confidence, cold start
40 seconds typical, with almanac < 1 month old
A.3 I/O Configuration
Output signals, or the designated input, may be selected on specified connector by means of internal
push-on jumpers and special wiring. Each output connector is independently buffered.
A.3.1

I/O Connectors

I/O connectors may be configured to any one of the output signals or a specific input function as
listed below:
Signals, three BNC, with output signals as described below.
Relays, two sets, 5-mm plug-type terminal block
A.3.2

Standard Output Signals

IRIG-B: Modulated (1 kHz carrier). Analog outputs are complementary emitter follower
(2N4401/4403) with 20-Ohm protective resistors, driven by a (LF442) op-amp. Modulated,
bus driver, 4 Vpp, 20-Ohm source impedance, and drives a 50-Ohm load at 3 Vpp – one BNC
connector
User configurable: IRIG-B Unmodulated, or Programmable Pulse – one BNC connector
User configurable: 1 PPS (10-ms pulse-width), IRIG-B Unmodulated (not available on earlier
units) or IRIG-B Modified Manchester (IEEE Std 1344) – one BNC connector
User configurable outputs are 5-V CMOS bus drivers with 10-Ohm source impedance and
drive capability.
Technical Specifications and Operating Parameters
75-mA