Description
The model 7126 is a 16-channel level translator packaged in a double width CAMAC module. It simultaneously converts in any direction between NIM, TTL and ECL logic families. In addition, a logical "OR" is possible for the ECL input and the NIM/TTL input. The input to output is direct coupled with the output duration equal to the input duration. Each channel has a single input connector which accepts a fast negative NIM level with 50 ohm input impedance and a positive TTL level with 500 ohms impedance. This produces a positive TTL output capable of driving a 50 ohm load and a bridged NIM output that drives two 50 ohm loads. The NIM output stage is current-switching which allows pulse clipping and is protected from damage due to shorted cables.
Input Characteristics
NIM/TTL 16 inputs, one per channel, LEMO style connector; accepts both
negative NIM or positive TTL pulses or levels.
NIM: 50 ohms impedance +/-10%; -500 mV threshold; input protected
to +/-8 VDC.
TTL: 500 ohms impedance +/-10%; +1.2 Volt threshold; input
protected to +/-8 VDC.
ECL Input 16 inputs, one per channel; 2 x 17 pin header with lock and eject
feature; accepts complementary ECL inputs; removable 110 ohm
input termination; 200 mV differential threshold.
Output Characteristics
NIM Outputs Two NIM outputs per channel; bridged -32 mA current switching,
LEMO style connectors; delivers one double amplitude NIM level or
two normal NIM levels into 50 ohms; 1.5 nsec rise and fall times.
TTL Output One TTL output per channel, LEMO style connector; sources 45 mA
to drive 50 ohm load or 1000 standard TTL loads, sink current of
100 mA; able to drive 100 standard TTL loads. 3.5 nsec rise and
fall times.
ECL Output Complementary ECL, one per channel; 2 x 17 pin header with
lock and eject feature; drives two 110 ohm ECL loads or up to
30 daisy-chained loads. Normal ECL levels of -800 mV and -
1.7 Volts, 2 nsec rise and fall times.
General Characteristics
Rate DC to 150 MHz for NIM and ECL translation,
DC to 100 MHz for TTL translation.
Minimum 4 nsec for NIM and ECL translation,
Pulse Widths 7 nsec for TTL translation.
Delay NIM, TTL or ECL input to NIM or ECL output = 5 nsec.
NIM, TTL or ECL input to TTL output = 10 nsec.
Power Requirements + 6V @ 450 mA, - 6V @ 1290 mA
+24V @ 110 mA, -24V @ 110 mA