Extron electronic ISM 824 manual Reference Information, cont’d

Reference Information, cont’d

Sync — ISM VS

Input type	Pass-through RGBHV, RGBS, RGsB
Output type	RGBHV, RGBS, RGsB
	Bi-level on Y, R-Y, B-Y channels (component video)
Standards	NTSC 3.58, NTSC 4.43, PAL, SECAM
Input level	0.5 V to 5.0 Vp-p, unterminated. 4.0 Vp-p normal.
Output level	TTL: 5.0 Vp-p, unterminated
Input impedance	75 ohms
Output impedance	75 ohms
Max. input voltage	5.0 Vp-p
Max. propagation delay	30 ns (RGB pass-through

Audio

Gain	Unbalanced output: -6 dB
	Balanced output: 0 dB
Frequency response	20 Hz to 20 kHz, ±0.5 dB
THD + nouse	0.03% @ 1 kHz at nominal level, 0 dB gain
S/N	>90 dB, at maximum rated output drive
Crosstalk	<-80 dB @ 1 kHz, fully loaded
Stereo channel separation	>90 dB @ 1 kHz
CMRR	>75 dB @ 20 Hz to 20 kHz

Audio input

Number/signal type	8 stereo, balanced/unbalanced
Connectors	(8) 3.5 mm captive screw connector, 5 pole
Impedance	>10k ohms, balanced/unbalanced, DC coupled
Nominal level	+4 dBu (1.23 V), -10 dBV (316 mV)
Maximum level	+19.5 dBu, (balanced or unbalanced) at 1% THD+N
Input gain adjustment	-18 dB to +24 dB

N0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu

Audio output

Number/signal type	2 (base model, upgradeable to 8) stereo, balanced/unbalanced
Connectors	(2, upgradeable to 8) 3.5 mm captive screw connectors, 5 pole
Impedance	50 ohms unbalanced, 100 ohms balanced
Gain error	±0.5 dB channel to channel
Maximum level (Hi-Z)	>+21 dBu, balanced or >+15 dBu unbalanced at 1% THD+N
Maximum level (600 ohm)	>+15 dBu, balanced or unbalanced at stated 1% THD+N
Output volume range	0 to 64 (-64 dB to 0 dB) in 1 dB increments from steps 1 through 64.

Control/remote — switcher

Serial host control port	1 rear panel RS-232 or RS-422, 9-pin female D connector
	1 front panel RS‑232 2.5 mm mini stereo jack
Baud rate and protocol	9800 baud, 8 data bits, 1 stop bit, no parity
Serial control pin configurations
9-pin D connector	RS‑232: 2	= TX, 3 = RX, 5 = GND
	RS‑422: 2	= TX-, 3 = RX-, 5 = GND, 7 = RX+, 8 = TX+

2.5mm mini stereo jack........ RS‑232: tip = TX, ring = RX, sleeve = GND

Ethernet control port	1 RJ-45 female connector
Ethernet data rate	10/100Base-T, half/full duplex with autodetect

B-4 ISM 824 Integration Scaling Multiswitcher• Reference Information