What is the resolution of the SONET Signal Delay Network Tester?
The resolution is 1 bit. One bit at OC 192 rate is ~100ps, at OC48 is ~401ps, at OC12 is ~1.608ns and at OC3 is ~6.43ns. The DG48 has a minimum delay of ~300ns, and can be incremented/decremented bit by bit, or set to a new delay, up to 250ms (or up to 750ms with the memory extension options). Note that in the Signal Delay, or DG, products when the delay is changed, the result is not ‘seamless’ as seen by the equipment to which it is connected. This is because the effect of changing the delay is the same as changing the length of the fiber it is emulating, and thus can result in lost data or the insertion of idle frames.
