Symmetricom / Microsemi XLi time & frequency standard is the most playable kit for the time domain and frequency domain application, it uses the source (GPS etc) discipline oscillator (Ruofferium, OCXO or TCXO), then output board sync to the oscillator, it uses modular design, and professional design for each part, also the whole metal heavy body;
if you just care the time domain (frequency peak to peak offset, jitter, deviation), then the sale is good for you, maybe the digital audio equipment like it:
the source is Trimble MT48 GPS, no 1024 weeks rollover problem, no leap second problem, the time/date is same as UTC time;
the oscillator is Symmetricom SA.22C Ruofferium, calibrated by me;
the output using 87-8022 (N.1 Frequency Synthesizer card, BNC interface), you can use one command to set the all 4 port from 1Hz to 50MHz, just like:F120 B4 1 5000000 2 10000000 3 15000000 4 11289600set port 1 to 5MHz, port 2 to 10MHz, port 3 to 15MHz, port 4 to 11.2896MHz
please search Google for the symmetricom XLi manual.
to set the kit, you can use front keyboard, GUI or RS232 command, the most easy way is use the RS232 command, quite simple;
the sale include:one used symmetricom XLi standard (Made in USA);one new USB-232 cable (FTDI chip, design in USA)
free ship to US 48 states.