User's Manual

Technical Specifications
RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 56 of 134
VSWR Measurement
Accuracy
8
RFI-148
RFI-900
Systag ≤ 1.10-B
Systag ≥ 1.11-B
Directivity
≥ 22 dB
≥ 35 dB
≥ 32 dB
Reflection tracking
≤ 2 dB
≤ 2 dB
≤ 2 dB
Source match
≥ 20 dB
≥ 20 dB
≥ 27 dB
Internal Reference
Frequency: 10 MHz
Stability: +/- 1 ppm (-30 to +75 degrees C)
External Reference
Frequency: 5 or 10 MHz
Amplitude: -20 to +15 dBm
Modulation
• POCSAG 512, 1200, 2400 bps (2-level FSK).
• FLEX 1600 (2-level FSK), 3200 (2- or 4-level FSK), 6400
bps (4-level FSK).
Real-time Clock
Time drift: 1 hour after 10 years
Battery life: 43 years (estimated)
Ethernet Port
10BASE-T/100BASE-TX, auto-negotiating.
Serial Ports
Dual asynchronous full-duplex RS-232
Baud rates (rear port only): 300, 600, 1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200 bps
Data bits (rear port only): 7 or 8
Parity (rear port only): None, odd, or even
Stop bits (rear port only): 1 or 2
Flow control (rear port only): None or hardware (RTS/CTS)
Control lines (rear port only): RTS, CTS, DTR, DCD
Front port configuration locked to 19200 8N1
Front port: DCE
Rear Port
RFI-148
RFI-900
DTE
DCE
Digital Inputs
TTL Schmitt trigger with internal 100 KΩ pull-up.
• Frequency Select 1
• Frequency Select 2
• Frequency Select 3
• Frequency Select 4
• Protocol Select
• Hardware PTT
• Tx Data L-bit
• Tx Data H-bit
• Transmit Clock
• Aux Input 1 (General purpose, RFI-148 only)
Alarm Outputs
Open-collector Darlington with 500 mA sink current.
8
For information on using these specifications to calculate the VSWR error please refer to the white paper
RD1194_Rev1_0_Determining_VSWR_Measurement_Error_from_Analyser_Datasheet_Specifications available from Home ›
Support & Downloads › Knowledge Base at the STI Engineering website.