[time-nuts] Preliminary list of GCRU-D Commands.

2008-05-16 Thread marks twotoe.com
Gentleman, Here are the commands I have found on the Chong Ho aka Samsung GCRU-D GPSDO. This is a very capable reference from the CDMA era. The GPSDO uses a subset of the Symmetricom scpi commands. Most interestingly there is a debug mode. I will follow up with interfacing to the unit and mod

Re: [time-nuts] HP 5370B

2008-05-11 Thread marks twotoe.com
Hi All, This is my first 5370B so I knew nothing about its expected behaviour. I bought it on eBay as the song goes and when it arrived I could see damage to the top right corner of the front frame that the operator panel screws into. It looked like it had been dropped and dropped quite hard.

Re: [time-nuts] HP 5370B

2008-05-09 Thread marks twotoe.com
nters > that can also measure frequency. Frequency is not their best feature. > > -Chuck Harris > > marks twotoe.com wrote: >> Could someone confirm if this behaviour is normal on a 5370B. >> >> When measuring the output of my standard the 10th and 11th digits are >

[time-nuts] HP 5370B

2008-05-09 Thread marks twotoe.com
Could someone confirm if this behaviour is normal on a 5370B. When measuring the output of my standard the 10th and 11th digits are constantly changing. Do I need a 10Mhz low pass filter on the input of the counter to get an accurate result or should I just ignore this behaviour? Many thnaks,

[time-nuts] Assistance with GCRU-D.

2008-04-27 Thread marks twotoe.com
Dear Timelords, RE: "I have 2 ways of recovering my only reference. The first is reflash the chip with a binary image. The second is upload the hex image through the serial port. I have neither image." No one has been forthcoming with assistance from this group. Through other channels I have

[time-nuts] HP-3336A Level Generator manual

2007-11-13 Thread marks twotoe.com
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Nigel, I have found a pdf copy of the Manual with full schematics for the ABC including optuion 5. If you still require it, let me know where I can send it? Now I am keen to get my 3336 going and I am after the ROM images f

[time-nuts] Reeves Hoffman 101BC OCXO

2007-06-08 Thread marks twotoe.com
Hi All, I have a Reeves Hoffman 101BC precision OCXO. It is a 10 Mhz one. I am trying to GPSD it. However EFC adj pot (10k) only goes to the pin with no reference voltage. Can I still control this ocxo in the same manner as the HP ovens such as the 10544? Mark _