| The
Hewlett-Packard 4935A/4936A Transmission Impairment Measuring Sets
provide the basic analog tests to isolate faults and to qualify
circuits for voice, data or broadcast transmission at frequencies
up to 110 kHz. The 4935A is compatible with Bell standards and the
4936A is CCITT compatible. Both of these test sets provide
measurements of level versus frequency, noise with various
selectable filters, Signal-to-Noise Ratio, Noise with Tone,
Three-level Impulse Nose and 4-wire single frequency return
loss. The 4935A performs the required tests to qualify the
local loop for Digital Dataphone Service up to 56 kbps. The
Peak-to-Average-Ratio (P/AR) measurement option on the 4935A gives
system users a powerful yet simple measure of the combined factors
which effect the overall data transmission quality.
Telephone companies, PABX and other
telecommunications equipment service people will find the
4935A/4936A has the analog testing capability they need. Both
instruments include standard dial and hold capabilities,
independent transmit and receive impedances, level zero function,
SF skip and complete unit annunciation. |
