1220A/1226A AUTO SWITCH FAILSAFE REDUNDANT SWITCH

The ptf 1220A (1U) and 1226A (2U) Auto Switch is purpose designed for time and frequency applications where reliability criteria call for redundant RF and Pulse sources. Based on the latest advances in semiconductor technology, the unit accepts two input pairs consisting of an RF (sine/square) signal and a pulse (typically 1 PPS). Both primary and backup input pairs are
monitored for signal health, and if either the primary RF or pulse signals are determined faulty, the unit automatically switches to the backup channel within < 3msec (typical). In addition to providing for local control from the instrument front panel, the comprehensive communications package provides status reporting and instrument control on both RS232 and Ethernet interfaces with a variety of available protocols. Range setting on the pulse and frequency inputs allows fast detection of RF signals from <1MHz to >20MHz and pulse ranges from 0.1second to 2 seconds, Front panel indicators include RF and fault monitoring on each of the input channels, together with active channel indication and operating mode (auto/manual). The 1226A (2&U) utilizes quad-bloc cards for additonal RF and Pulse outputs (up to 24 total).

• Switches two RF/Pulse Pairs
• Fast Switching time (<3msec typical)
• Settable pulse and RF period
• Settable “jitter” range
• Remote Control/Monitor
• SNMP, HTTP, Console, interfaces
• Power fail “failsafe” operation

Inputs  
RF  
Frequency 1MHz to 30MHz
Amplitude 13dBm into 50 ohms
  (1V rms into 50 ohms)

Digital  
Frequency 0.01 PPS to 20 MPPS
Amplitude 5V TTL into 50 ohms
  (nominal)
optional:  
RS 422 (DI42) Differential TTL i/p's
  (Tri-Axial Connectors)

Time Code  
Modulation Freq. 100Hz to 1MHz
Amplitude 3V pk-pk
Modulation Ratio 3 : 1

Switching Characteristics  
Switch Type Latching Relay
Switching time <3ms typical

Indicators/Controls  
Power/Sum. Fault Green/Orange LED
Channel Ok/Fault Green/Red LED
Manual Selected Red LED

Controls  
Auto/Manual Membrane switch
Channel Select Membrane switch
Outputs  
RF  
Frequency 1MHz to 30MHz
Amplitude 13dBm into 50 ohms
  (1V rms into 50 ohms)

Digital  
Frequency 0.01 PPS to 20 MPPS
Amplitude 5V TTL into 50 ohms
  (nominal)
optional:  
RS 422 (DO42) Differential TTL o/p's
  (standard 'D' connector)
TR42 Tri-Axial Connectors
  for RS 422

Time Code  
Modulation Freq. 100Hz to 1MHz
Amplitude 3V pk-pk
Modulation Ratio 3 : 1

Power Supply  
Input voltage 90 - 264 VAC
Input power <10W

Environmental  
Temperature: 0° to 55° C
Relative Humidity: 0 to 95%, non-condensing
   

Physical  
Dimensions (HxWxD): 2U x 19” x 12”
Weight <15 lbs

1220A/1226A AUTO SWITCH FAILSAFE REDUNDANT SWITCH PDF DOCUMENT