GAI-Tronics LE200, LE200-FSR, LE200-FLR Page/Party Line Extenders - Manual (Page 50)

Pub. 42004-701L2F
M ODEL LE200 S ERIES W ALL -M OUNT P AGE /P ARTY
®
L INE E XTENDERS P AGE 48 of 50
f:\standard ioms - current release\42004 instr. manuals\42004-701l2f.doc
04/09
Party Line #1 Audio between Two LE200s
Frequency response ..........................................................................300 Hz to 7.0 kHz
±0.5 dB @ -10 dB
Reference voltage level ................................................................ 1.5 Vrms @ 33
Ω impedance (nominal)
Output type ................................... Current source with 3.3 k
Ω impedance, transformer coupled (nominal)
Gain error.....................................................................................................
±3 dB @ 1,020 Hz sine wave
0 dB ref. 1.5 Vrms @ 33
Ω impedance both ends
Distortion + noise ................................................................................THD <1.0% @ 1,020 Hz sine wave
0 dB ref. 1.5 Vrms @ 33
Ω impedance both ends
Sampling rate ................................................................................... 16,000 samples per second
± 32 ppm
Encoding.......................................................................................................................................... linear
Direction .................................................................................................................................. full duplex
N OTE : Refer to text for considerations when connecting LE200s in series.
Party Line #2 to #5 Audio between Two LE200s
Frequency response ..........................................................................300 Hz to 3.5 kHz
±0.5 dB @ -10 dB
Reference voltage level ................................................................ 1.5 Vrms @ 33
Ω impedance (nominal)
Output type ................................... Current source with 3.3 k
Ω impedance, transformer coupled (nominal)
Gain error.....................................................................................................
±3 dB @ 1,020 Hz sine wave
0 dB ref. 1.5 Vrms @ 33
Ω impedance both ends
Distortion + noise ................................................................................THD <1.0% @ 1,020 Hz sine wave
0 dB ref. 1.5 Vrms @ 33
Ω impedance both ends
Sampling rate ...................................................................................... 8,000 samples per second
±32 ppm
Encoding.......................................................................................................................................... linear
Direction .................................................................................................................................. full duplex
N OTE : Refer to text for considerations when connecting LE200s in series.
Page Line Audio Detection
Detection peak voltage threshold selections .......................................................-12 or -24 dB ref. nominal
Detection hold time selections .................................................. 40, 160, 640, 1280 milliseconds (nominal)
Hold time on audio detected relay output ......................................................................1 second (nominal)
Page Line Ground Fault Detection
DC resistance from either L1 or L2 to ground for fault................................................................
≤5,000 Ω
DC resistance from either L1 or L2 to ground for no fault ...........................................................
≥8,000 Ω
Minimum ground fault duration for detection ........................................................... 10 seconds (nominal)
Minimum no ground fault duration for detection....................................................... 10 seconds (nominal)
No ground fault to ground fault propagation delay .............................
≤ 20 seconds includes detection time
Ground fault to no ground fault propagation delay .............................
≤ 20 seconds includes detection time
N OTE : Rapidly changing ground fault conditions may or may not be detected.
Page Line Ground Fault Generation
Resistance when generating ground fault .........................................................................3.3 k
Ω (nominal)
Resistance when not generating ground fault ..................................................................................
≥1 MΩ
N OTE : The resistance is from the center tap of the page line coupling transformer to ground.