Hall A uses RG-213 cable as an analog delay line. The trigger logic which generates the gate signal requires a finite amount of time. In order to avoid the detector output arriving at the input of the ADC or TDC modules prior to the arrival of the gate signal, a delay is inserted in-line. This RG-213 delay is required to hold the analog pulse for the photomultiplier tubes. Several options are available for forming an analog delay. Hall A selected a coaxial cable. RG-213 was selected based on cost vs. performance evaluation by Hall B.


Recommended RG-213 cables.

RG-213 is in the stock room under stock number 614570015

Typical RG-213 Coaxial Cable Specifications

RG/U
Type
Cable
Inner
Conductor
(Ohms/1000ft)
Dielectric
Material
DOD Number/Type
of Shielding
Braids
(Ohms/1000ft)
O.D. Weight
(lb/ft)
Nom.
Imped.
(Ohms)
Nom.
Cap
pf/ft
Max.
Operating
Voltage
(Volts RMS)
Comments
213 .0888
2.26
7/.0296 BC
0.75
(1.7)
PE .285
7.24
1 / 97% BC
(1.2)
.405
10.29
0.099 50 30.8 5000 Use up to
1000 MHz
8 .0855
2.17
7/.0285 BC
0.72
PE .285
7.24
1/BC .405
10.29
0.106 52 29.5 4000 Use RG213
8A .0855
2.17
7/.0285 BC
0.72
PE .285
7.24
1/BC .420
10.29
0.106 52 29.5 5000 Use RG213

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