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It took about 24-hours after my payment before I was able to get to the download. Apparently, payment processing is not 100% automated. That is no big deal, just be aware of that going in.
After I got to it, it was in good shape, easy to read, etc. Not some cheap FAX copy looking thing.
Also, this site was the cheapest I found. Another Plus!
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Good price, very legible manual, exactly what I needed -- but had to wait a day to actually get the download of the manual. Would have preferred to download it immediately after payment rather than waiting for someone to "process" my order. I was surprised that I had to wait that long.
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As the only source for this manual it rather rank quite high since it is well scanned and perfectly readable.
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the manual is in good quality and it's in pdf. manual was send in less then 24h.
regards
mike
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I would not plug this machine in without finding a manual like this. In addition to setup and normal operating instructions, it has troubleshooting flowcharts, diagrammed mechanical adjustments, and schematics to beat the band. The tech I hand it to would be thrilled to find solder side PCB diagrams with component outlines superimposed, pinouts for every IC chip, and line drawings of transistors, with labeled legs.
As for printing quality, this may be a copy of a copy, but even the finest print when enlarged is very legible. There is a bit of grayed print over a few pages, as if a wet page were placed over it, but the print is still very legible. If you could borrow an original manual and get it printed and bound for 4 to 6 times the cost, you could get better quality. In that case you wouldn't be here. For price, utility, and availability I am rating this manual highly.
Philips Semiconductors
100 � 450 MHz 250 W Power Ampli�er with the BLF548 MOSFET
Application Note AN98021
In order to compensate for the 6 dB/octave slope, matching to Zin is achieved at 450 MHz. At lower frequencies a mismatch is created, resulting in a decrease of powergain inversely proportional to the increase of the gain related to the transistor�s 6 dB/octave slope. The network listing of the input circuitry, again presented as a 3-port, is given in �Appendix B�. The network response (both input returnloss and predicted powergain) is given in Fig.4. Finally the schematic diagram and list of components are given in Fig.5. The unit�s layout is given in Fig.6. Note: two toroidal cores around T2 and T3 are used to prevent oscillations. 5 5.1 ADJUSTMENT OF THE AMPLIFIER Tuning the outputnetwork
In order to terminate the transistor with the proper load impedance, first the output network has to be tuned. The transistor was replaced by a dummyload, representing the transistors output impedance under full power conditions. The dummyload was realized after fitting the data of Table 3. To the dummyload model (roughly Rload in parallel with Coss, in series with draininductance Ld). Later the model was compensated for parasitics of both SOT262 header and network components. Initial settings for each side of the dummyload are: Rload = Vds2/2 � Pl = 5.2 � C = 1.15 � Coss = 104 pF L = Ld = 0.5 nH The network listing is given in �Appendix C�. The final result, the dummyload lay-out, is given in Fig.7.
handbook, halfpage
20
MGH787
(1)
10
0
(2)
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�20 100
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400 500 frequency (MHz)
(1) DB [S12]. (2) DB [S22].
Fig.4 Simulated network response of inputside (predicted Gp = f(f)).
1998 Mar 23
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