PULSECOM 4TOLB-3L1 - Page 18

4TOLB-3L1
1306, Issue 2, May 1992
18
Table 3. 4TOLB-3L1 Specifications
Parameter Condition Value
A. Transmission
Nominal Impedance T, R and T1, R1 600 Ω
TRMT Input Level a) Nominal
b) Range
–16 dBm
–16 to +16.5 dBm
RCV Output Level a) Nominal
b) Range
+7 dBm
–17 to +7 dBm
TRMT TLP –8.5 dBm
RCV TLP +4.0 dBm
TRMT Attenuation a) Range
b) Resolution
c) Steps
0 to 32.5 dB
.1 dB
.1, .2, .4, .8, 1.6, 3.2, 6.4, 12.8 dB
RCV Attenuation a) Range
b) Resolution
c) Steps
0 to 24 dB
.1 dB
.1, .2, .4, .8, 1.5, 3, 6, 12 dB
Frequency Response 300 to 3000 Hz ± 0.15 dB
Return Loss 600 Ω
a) 1000 Hz
b) 300 to 3000 Hz
≥ 28 dB
≥ 23 dB
Longitudinal Balance
(Ref. –16 TLP)
a) 200 to 1000 Hz
b) 3000 Hz
> 74 dB
> 69 dB
Crosstalk 700 to 3000 Hz ≤ –71 dB
Idle Channel Noise a) Overall
b) TRMT
c) RCV
≤ 20 dBrnC0
≤ 17 dBrnC0
≤ 17 dBrnC0
Nominal Sealing Current Typical
a) 0 k Ω loop
b) 2 k Ω loop
30 mA
22 mA
ZAP Sealing Current Typical, 0 k Ω loop 60 mA