524* family counter question

morriso2002

Hi all,

I'm trying to find a manual for my 5245M counter. I do have a manual 
for the 5245L and I know the only significant difference between the 
two is in the frequency reference.

A friend has offered to lend me the manual for a 5248 counter which 
apperently looks identical to the 5245.

Can anyone here educate me about:

1. The difference between the 5245 and 5248
2. Whether the 5248 reference is the same as the one in the 5245M?

Thanks,

Morris

Dave Brown

#521

Hi Morris
Without digging through all the details the basic difference is as you describe - the M has a separate transformer/regulator supply for the complete reference-both the oven and the oscillator etc run as long as it is plugged into the AC supply. In early versions of the L the only the oven runs continuously-the oscillator does not.
Not sure re later versions of the L but there was an upgrade kit that put the 10 MHz 10811A OCXO in both the 5245L and the 5248. With that in place I think the oven and the oscillator both run continuously.

The original reference in  the 5245L was 1 MHz and the 10811A upgrade kit had an extra divider to get down to 1 MHz.
Don't think there are any other significant differences but would have to look at the books to find out. Don't know the 5248 at all sorry.

I have an L and an M and their handbooks-plus a video amp and a 500 MHz plugin- looking for a 5255 12 GHz plugin (cheap!) I have a 5257A 18GHz xfer osc plugin but it's naffed. Only want the 5255 to be able to log 10 GHz readings over time- with the D/A converter chart recorder combo. I have an EIP 545  but it's BCD output option seems to be pretty rare.

DaveB
Christchurch, NZ

Show quoted text

----- Original Message ----- 
From: "morriso2002" <morriso@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, September 23, 2004 2:25 PM
Subject: [hp_agilent_equipment] 524* family counter question

Hi all,

I'm trying to find a manual for my 5245M counter. I do have a manual
for the 5245L and I know the only significant difference between the
two is in the frequency reference.

A friend has offered to lend me the manual for a 5248 counter which
apperently looks identical to the 5245.

Can anyone here educate me about:

1. The difference between the 5245 and 5248
2. Whether the 5248 reference is the same as the one in the 5245M?

Thanks,

Morris

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Joseph Orgnero

#524

Hello all,
FYI, I  have a 5248M counter with the 5254C frequency converter (3 Ghz),
no manual, but very similar to the 5245L, the HP 1970 catalog states
that the main differences are range extended to 150 Mhz, period
measurement resolution of 10 ns and time interval reslution of 10 ns.
The 5248M has a 5 Mhz crystal while the 5248L has a 1 MHz crystal. By
the way the catalog price was U$S 3300.00
73's
Joe Orgnero VE7LBI

Show quoted text

----- Original Message -----
From: "Dave Brown" <tractorb@...>
To: <hp_agilent_equipment@...>
Sent: 22 September 2004 23:07
Subject: Re: [hp_agilent_equipment] 524* family counter question

Hi Morris
Without digging through all the details the basic difference is as you
describe - the M has a separate transformer/regulator supply for the
complete reference-both the oven and the oscillator etc run as long as
it is plugged into the AC supply. In early versions of the L the only
the oven runs continuously-the oscillator does not.
 Not sure re later versions of the L but there was an upgrade kit that
put the 10 MHz 10811A OCXO in both the 5245L and the 5248. With that
in place I think the oven and the oscillator both run continuously.

The original reference in  the 5245L was 1 MHz and the 10811A upgrade
kit had an extra divider to get down to 1 MHz.
Don't think there are any other significant differences but would have
to look at the books to find out. Don't know the 5248 at all sorry.

I have an L and an M and their handbooks-plus a video amp and a 500
MHz plugin- looking for a 5255 12 GHz plugin (cheap!) I have a 5257A
18GHz xfer osc plugin but it's naffed. Only want the 5255 to be able
to log 10 GHz readings over time- with the D/A converter chart
recorder combo. I have an EIP 545  but it's BCD output option seems to
be pretty rare.

DaveB
 Christchurch, NZ

----- Original Message -----
From: "morriso2002" <morriso@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, September 23, 2004 2:25 PM
Subject: [hp_agilent_equipment] 524* family counter question

Hi all,

I'm trying to find a manual for my 5245M counter. I do have a manual
for the 5245L and I know the only significant difference between the
two is in the frequency reference.

A friend has offered to lend me the manual for a 5248 counter which
apperently looks identical to the 5245.

Can anyone here educate me about:

1. The difference between the 5245 and 5248
2. Whether the 5248 reference is the same as the one in the 5245M?

Thanks,

Morris

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#527

--- In hp_agilent_equipment@..., "morriso2002"
<morriso@v...> wrote:
Hi all,

I'm trying to find a manual for my 5245M counter. I do have a manual 
for the 5245L and I know the only significant difference between the 
two is in the frequency reference.

A friend has offered to lend me the manual for a 5248 counter which 
apperently looks identical to the 5245.

Can anyone here educate me about:

1. The difference between the 5245 and 5248
2. Whether the 5248 reference is the same as the one in the 5245M?
Hello Morris,

The Difference is that the M-Versions have a very high accuracy
Time Base. It is the Oven and Oscillator of the HP-105 High Stability
crystal oscillator. I can make Copies of the Oscillator-Pages from
my 5248M manual.

Jorgen
dj0ud

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524* family counter question