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> Agilent hp 3777A channel selector telephone T1 DS1
Agilent hp 3777A channel selector telephone T1 DS1
The Agilent HP 3777A is an HP-IB controlled Channel Selector. It provides test point access for maintenance and production testing of PCM and FDM telecommunications systems.
The instrument contains two identical banks of relays. Each bank comprises up to 30 balanced, bi-directional, two-pole changeover switches. The transmit bank enables switching of a single source to any one of up to 30 outputs. In the receive bank, any one of up to 30 inputs can be switched to a common output. To provide a quiet termination for telecommunications equipment, all unlocked channels are terminated in 600 Ohms in series with 2.2uF.
