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On Wed, 10/11/17, Larry McDavid lmcdavid@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: [hp_agilent_equipment] Re: Fast Rise/Fall Time Pulser
To: TekScopes@..., "Time-Nuts Mail List" <time-nuts@...>, "HP Aglient Reflector" <hp_agilent_equipment@...>
Date: Wednesday, October 11, 2017, 1:28 PM


?









The Leo Bodnar pulser output level is adjustable
but at outputs higher

than some 1 v P-P the rise/fall times increase. I reported
the ~0.95 v

P-P as what was reported on the datasheet for *my*
pulser.



Ok, per Leo's August 7, 2017 post, the output device is
a Maxim MAX3949.

Mine is marked, "AJK BAA." Does anyone know the
origin or significance

of that marking?



Per Leo's August 5, 2017 post, the pulser fastest rise
time occurs when

the output level is set to 820 mv and the scope reports 976
mvpp. That

is consistent with what is reported for my pulser on the
supplied test

datasheet.



Why would you want to set the output level higher than that
at which the

risetime is fastest? ~ 1 vpp seems enough.



Larry



On 10/11/2017 8:29 AM, David DiGiacomo telists@...
[TekScopes] wrote:

> On Tue, Oct 10, 2017 at 11:01 PM, Larry McDavid
<lmcdavid@...> wrote:

> > Neither the Analog Devices nor the Maxim part
(see below) data sheets

> > suggest the markings actually seen on the device
used on the Leo Bodnar

> > pulser I received. As recently as July 8, 2017
Leo Bodnar described the

> > device as "based on 572 comparator from
AD" in a posting on EEVblog.

>

> The Maxim datasheet doesn't say anything about the
product marking.

>

> Here's Leo's later post:

>


>

> > One poster commented on the high pulse voltage of
±1 volt; that is not

> > correct. The Leo Bodnar pulser output is about
0.95 v P-P.

>

> It's adjustable up to 1.2VPP into 50ohms, or 2.4VPP
open circuit.

>

> Product page:

>


--

Best wishes,



Larry McDavid W6FUB

Anaheim, California (SE of Los Angeles, near Disneyland)











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