My records have the previous RCVR to ADC cables were
Federated Cable
SMA plug/SMA-plug 50 ohm coax cable
RG58C 60" long
P/N: CA1514-60
velocity of propagation: 66% (1.54nS/ft, 5.05nS/m)
In the current system:
RCVR to bulkhead:
50ft as described below
bulkhead to ADC:
www.firstsourceinc.com
2 meter LMR100A cable with RSA-3050-B to R114 082 000
the RSA-3050-B is straight SMA bulkhead mount socket. pure round - not D.
the R114082000 is straight SMB plug
P/N: LMR100-2471-2M
LMR100A : 1.54 nS/ft (5.05 nS/m)
On Fri, Feb 6, 2015 at 9:26 AM, danny jacobs <[email protected]> wrote:
> So the two major changes introduced between 64 and 128 are:
> 1) some antenna numbers in the range 63-127 got rcvr-antenna cables which
> are not exactly 150m (500ns)
> 2) rcvr-adc cables were lengthened from ~3m (7ns) to 50m (60.5ns)
>
> But we see a ripple of 150ns, right in between 121 and 181.5. What if we add
> on the distance from the container bulkhead to the adcs? How long are those
> cables?
>
>
>
> On Fri, Feb 6, 2015 at 9:21 AM, Saul Kohn <[email protected]> wrote:
>>
>> So PSA128 recycled PSA64 cables and got 64 new ones. Do we know which
>> antennas have which?
>>
>> Saul Aryeh Kohn
>>
>> PhD student
>> University of Pennsylvania
>> -----------------------------------------
>> ZOO
>> David Rittenhouse Laboratory
>> 209 South 33rd Street
>> Philadelphia PA, 19104
>>
>> On Fri, Feb 6, 2015 at 10:58 AM, danny jacobs <[email protected]>
>> wrote:
>>>
>>> Duh.
>>> So 120ns bounce rcvr to hut..
>>>
>>>
>>> On Friday, February 6, 2015, David DeBoer <[email protected]> wrote:
>>>>
>>>> 500 ft ~ 150m ant to receiver
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Feb 6, 2015, at 10:50 AM, danny jacobs <[email protected]>
>>>> wrote:
>>>>
>>>> Ant to rcvr are 150 ft ~ 50m, no?
>>>>
>>>> On Friday, February 6, 2015, Matt Dexter <[email protected]> wrote:
>>>>>
>>>>> RX to bulkhead cables
>>>>> SMAM-LMR240-SMAM-50-CT1
>>>>> www.fieldcomponents.com
>>>>>
>>>>> SMA Straight Male Crimp Plug on LMR240 to SMA Straight
>>>>> Male Plug 50 Feet Long
>>>>> Connectors will be Passivated Stainless Steel
>>>>> Rubber caps will be put on the ends of the SMA Connectors
>>>>> Labels will be black shrink with white lettering on the 256
>>>>> cables that require labels. Labeled on Both Ends
>>>>> The last 32 cables will have a
>>>>> white blank label on both ends of the cable
>>>>> VSWR 1.35:1 at 4 Ghz
>>>>>
>>>>> LMR240 is 1.21ns/ft
>>>>> 1.21 * 50 = 60.5 ns one way.
>>>>>
>>>>> On Fri, 6 Feb 2015, Chris Carilli wrote:
>>>>>
>>>>>> Date: Fri, 06 Feb 2015 08:37:56 -0700
>>>>>> From: Chris Carilli <[email protected]>
>>>>>> To: [email protected]
>>>>>> Subject: Re: memo on PAPER 128 autocorrelations
>>>>>>
>>>>>> 6MHz = 50m reflection. what in the system is 25m or 50M round trip?
>>>>>> cables from receivorator to bulkhead?
>>>>>>
>>>>>> cc
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 02/05/2015 01:55 PM, Jonathan Pober wrote:
>>>>>>>
>>>>>>> Hi everyone,
>>>>>>>
>>>>>>> I had a little bit of time today to do some writing, and so jotted
>>>>>>> down some of the things we noticed looking at the PSA 128 data back in
>>>>>>> January. There are two sections: (1) looking at a 6 MHz ripple that now
>>>>>>> shows up in all of our autocorrelation spectra, and (2) looking into
>>>>>>> Omnical's ability to identify and flag antennas on an initial run. I'm
>>>>>>> sending this email to the PAPER list, but since this is essentially the
>>>>>>> exact hardware that will become HERA in 2 months, this may make sense
>>>>>>> as a
>>>>>>> HERA memo. I leave it to the powers that be to decide.
>>>>>>>
>>>>>>> Jonnie
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Sent from Gmail Mobile
>>>
>>>
>>>
>>> --
>>> Sent from Gmail Mobile
>>
>>
>
>
>
> --
>
> National Science Foundation Fellow
> Arizona State University
> School of Earth and Space Exploration
> Low Frequency Cosmology
> Phone: (505) 500 4521
> Homepage: http://loco.lab.asu.edu/danny_jacobs/
