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@davmar.org [TekScopes] wrote: > On Tue, Oct 10, 2017 at 11:01 PM, Larry McDavid <lmcdavid@lmceng.com> 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: > https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/msg1275011/#msg1275011 > > > 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: > http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295 -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland)

>From https://www.maximintegrated.com/en/design/packaging/topmark/ the MAX3949 is marked "AJK". I suspect BAA is some sort of date code. > Sent: Wednesday, October 11, 2017 at 2:28 PM > From: "Larry McDavid" <lmcdavid@lmceng.com> > To: TekScopes@yahoogroups.com, "Time-Nuts Mail List" <time-nuts@febo.com>, "HP Aglient Reflector" <hp_agilent_equipment@yahoogroups.com> > Subject: Re: [time-nuts] Fast Rise/Fall Time Pulser > > 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@davmar.org [TekScopes] wrote: > > On Tue, Oct 10, 2017 at 11:01 PM, Larry McDavid <lmcdavid@lmceng.com> 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: > > https://www.eevblog.com/forum/projects/yet-another-fast-edge-pulse-generator/msg1275011/#msg1275011 > > > > > 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: > > http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=124&products_id=295 > -- > Best wishes, > > Larry McDavid W6FUB > Anaheim, California (SE of Los Angeles, near Disneyland) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >